The man was last seen after he jumped off a boat south of Electric City in Banks Lake in Grant County. Another Recovery Effort Underway on Tuesday, August 11The Grant County Sheriff's Office says water rescue teams, with help from King and Pierce County Search and Rescue, are combing another portion of Banks Lake in Grant County to try to recover a man who disappeared July 30. Get our free mobile appThe man, whose name has not been released, was in his mid 30's and jumped into the water without a life jacket. The GCSO says if boaters or recreationists see these rescue teams on the water, to please give them plenty of room to work, and avoid the area. Banks Lake is a large recreation area, it's 27 miles long, and extends from southern Douglas into Grant County.